Irregular Design Group, HESYCHIA SIXK + HFH Suppressor Bundle, 5.56mm/6ARC, 1/2 X 28, Magpul ODG

$1,349.99
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SKU
IDG-SIXK-ODG-28
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HESYCHIA SIXK + HFH Suppressor Bundle | 1/2" X 28 | Magpul ODG

The IDG HESYCHIA SIXK + HFH BUNDLE includes our flagship suppressor and muzzle device, everything you need to start shooting suppressed.

HESYCHIA SIXK: Multi-Stage Hybrid Suppressor

Hesion Bow (Patent Pending) Locking System

A patent-pending dual-locking mechanism forged from Inconel 718. Secures with over 1,700 lbs. of sealing force via a 15-degree taper and 1 1/8” - 8 left-hand buttress thread—locks in under 2.5 turns. Six flexure pawls, printed directly into the suppressor body, engage a 32-tooth geared ring for sub-degree precision and zero failure points. The protective hood doubles as 1.5" wrench flats (flat-to-flat) for practical field use. Built for unyielding reliability under heat and shock.

Multi-Stage Hybrid Core

Engineered for control, this core reduces backpressure, noise, and flash while venting gas forward to protect shooter and firearm. Asymmetric baffles maximize harmonic disruption and gas diversion, paired with internal helical annular pathways that extend off-gassing duration from the blast chamber and main stack. Recessed flash-hiding geometry eliminates snag hazards, with special tines filtering unburnt powder to cut external flash. Disruptive micro-texturing on internal gas paths boosts turbulence without fouling.

SIXK SPECS

CALIBER RATING
6MM ARC, 5.56MM NATO
OVERALL LENGTH 
5.72"
LENGTH ADDED TO MUZZLE
3.625"
DIAMETER
1.65" 
WEIGHT
15.5 oz. 
MATERIAL
INCONEL 718
CONSTRUCTION
LPBF
FINISH
HIGH TEMP CERAKOTE®, RAW
MOUNT
1.125" - 8 AMERICAN BUTTRESS THREAD (PATENT PENDING)

HESION BOW (U.S. Patent No. 12460889)

BARREL RESTRICTIONS
10.3" MINIMUM
FULL AUTO RATED
YES
INTERNAL TAPER ANGLE
15 DEGREES INCLUDED

HESYCHIA Hybrid Flash Hider

Hesion Bow (Patent Pending) Locking System

Additively manufactured from Inconel 718, this hybrid flash hider mates seamlessly with the HESYCHIA SIX Series. Secures with over 1,700 lbs. of sealing force via a 15-degree taper and 1 1/8” - 8 left-hand American Buttress Thread (Patent Pending) —locks tight with just 15 ft-lbs. of torque in under 2.5 turns. Integrates with six flexure pawls in the suppressor for precise alignment and rock-solid hold, no extra parts to fail. Matching Inconel construction and robust thread design resist thermal locking for reliable performance.

Hybrid Flash-Recoil Core

Engineered for balance, this design reduces flash and softens recoil. A helical structure with diamond-shaped ports and subtle baffles disperses gas smoothly, shrinking muzzle signature and disturbance range over traditional hiders. Delivers noticeable recoil reduction standalone, yet shines suppressed—vectoring gas to the SIXK’s blast chamber walls for controlled, steady shooting. 

HFH SPECS

CALIBER RATING
6MM ARC, 5.56MM NATO
OVERALL LENGTH 
2.125"
LENGTH ADDED TO BARREL
1.5"
DIAMETER
1.25"
WEIGHT
3 oz. *
MATERIAL
HEAT TREATED - INCONEL 718
CONSTRUCTION
LPBF
FINISH
Physical Vapor Deposition (PVD)
MOUNT
1.125" - 8 AMERICAN BUTTRESS THREAD (PATENT PENDING)

HESION BOW (U.S. Patent No. 12460889)

TAPER ANGLE
15 DEGREES INCLUDED